Thinking about a 10", just because she reads A LOT. And then maybe I won't be chasing the bigger and bigger screen for years.

She plays games and reads. Mom would probably use it some for internetPosted via Mobile Device

Well in the 9"+ space you have a bunch of options with more coming soon, so obviously it will pay off to wait a bit before making a decision. Right now, The Kindle FIre HD 8.9" is a solid tablet for around $300 .. even better if you have Amazon Prime.. tons of free books, movies and tv shows. BUT I don't think it ships until Nov 20th, so if it were me, I'd wait until Nov 1 (Windows tabs will be out by then but I doubt that is what you will want) to see what else is out there then pre-order if nothing better comes along.